These are the fees for sending a package by Media Mail:
$\bullet$ $\$2.41$ for the first pound
$\bullet$ $\$0.41$ per additional pound for the next six pounds
$\bullet$ $\$0.39$ per additional pound after that
For example, a two-pound package costs $\$2.82$ to send by Media Mail.
If a package full of books costs $\$7.99$ to send by Media Mail, how many pounds does the package weigh? Explain your work in complete sentences.
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